Pottstown, Pennsylvania · field elev 256 ft
Density Altitude at Pottstown Municipal (N47)
Pottstown Municipal sits at 256 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 1,917 ft — heat still trims performance, but the field rarely turns high-and-hot.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 29.7 | −1,661 ft | 37.4 | −1,123 ft |
| February | 31.9 | −1,506 ft | 40.4 | −916 ft |
| March | 39.8 | −957 ft | 49.1 | −324 ft |
| April | 50.7 | −217 ft | 61.3 | 485 ft |
| May | 60.4 | 426 ft | 71.0 | 1,112 ft |
| June | 69.1 | 990 ft | 79.3 | 1,637 ft |
| July | 74.0 | 1,303 ft | 83.8 | 1,917 ft |
| August | 71.9 | 1,169 ft | 81.5 | 1,774 ft |
| September | 64.7 | 706 ft | 74.6 | 1,341 ft |
| October | 53.3 | −43 ft | 63.3 | 615 ft |
| November | 43.0 | −738 ft | 52.4 | −103 ft |
| December | 34.4 | −1,331 ft | 42.1 | −799 ft |
▲ above 5,000 ft · ⚠ above 8,000 ft. These are planning references at standard pressure and dry air — afternoon humidity and low pressure both push the real number higher. Run today's values below.
Run today’s numbers for N47
DENSITY ALTITUDE
Field elevation 256 ft — the air behaves like 1,930 ft.
- PRESSURE ALT
- 257 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
- —
- AIR DENSITY
- —
- WATER · GRAINS/LB
- —
For training and reference · verify with official sources and your POH before flight · no tool on this site renders a go / no-go judgment
Nearby Pennsylvania fields
- KPTW — Heritage Field
Pottstown · elev 308 ft
- 7N8 — Butter Valley Golf Port
Bally · elev 500 ft
- KRDG — Reading Regional/Carl A Spaatz Field
Reading · elev 343 ft
- KOQN — Brandywine Regional
West Chester · elev 465 ft
- KUKT — Quakertown
Quakertown · elev 525 ft
- KCKZ — Pennridge
Perkasie · elev 568 ft
- KMQS — Chester County G O Carlson
Coatesville · elev 660 ft
- KLOM — Wings Field
Philadelphia · elev 302 ft
Frequently asked questions
How high does density altitude get at N47 in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Pottstown Municipal reaches roughly 1,917 ft at standard pressure. Hotter-than-normal days, low pressure, and humidity all push it higher, so run the day's actual numbers before flying.
What is the density altitude at N47 on an average day?
It swings with the seasons: from roughly −1,661 ft at the coldest month's average temperature to about 1,303 ft at the warmest month's — all from a constant field elevation of 256 ft. The month-by-month table above carries the full year.
What is the field elevation of Pottstown Municipal?
256 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is N47 (FAA), in Pottstown, Pennsylvania.